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JOHN H. SHAW, OF NEW HAVEN, CONNECTICUT, ASSIGN-OR T0 SARGENT & COMPANY, OF NEW HAVEN, CONNECTICUT, A CORPORATION OF CONNECTICUT.

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To all whom it may concern:

Be it known that 1, JOHN H. SHAW, of the city and county of New Haven and State of Connecticut, have invented new and useful Improvements in Locks, of which the following is a full, clear, and exact description when taken in connection with the accompanying drawings, which form a part thereof, and in which Figure 1 represents a side elevation of a lock embodying the invention, with the cap plate removed, Fig. 2, a similar view in which the key bolt operated from the inside is shown protracted, Fig.3, a similar view in which the key bolt operated from the outside is shown protracted, Fig. 4, a reverse view of the lower part of the lock, Fig. 5 a detail view, in side elevation, of the sliding catch, Fig. 6, a detail bottom view of the yoke, and Fig. 7, a detail view of the connecting lever.

In all figures, similar letters of reference represent like parts.

This invention relates to looks, and more particularly to locks for use on the doors of hotels, or other public buildings, where a the hands of different individuals.

One of the improvements of the present invention is the production of a novel lock in which when the bolt operated from the inside of the room is protracted, the yoke is locked against retraction and the knob against rotation, so that any one on the outside of the door may ascertain at once by the refusal of the knob connected with the latch bolt to turn,

The object of this invention is to produce a novel and eflicient lock which shall have the feature above set forth, and to this and other, ends the invention consists of the sev- Specification of Letters Patent. Application filed March ,31, 1911.

that the door is locked on the Patented June 24, 1913. Serial No. 618,184.

1 coiled spring G surrounds the spindle, and bears against the plate E, and normally tends to hold the latch bolt C in its protracted position.

' H designates a sliding yoke, and I the hub of the knob spindle, with win-gs J adapted to bear against the yoke H. The yoke is provided with a lateral offset K, adapted to engage the flanged rear end L of the spindle, so that upon the turning of the hub I and the retraction of the sliding yoke H, the spindle D will be retracted .by the engagement of the offset K with the flange .L. A coiled spring M surrounds a' spindle N, which projects through one end of the sliding yoke H and bears against a stop 0 in the casing A in well known manner. The spring M tends to holdt-he sliding yoke in its normal protracted posit-ion.

P is a key bolt, adapted to be operated by a key, which may be inserted through a keyhole Q on the outside of the door. second key bolt, adapted to be operated by a key inserted through the keyhole S on the inside'of the door; The two bolts P .and R may be provided with suitable tumblers T, which may be connected by a tumblerHba-r U of substantially the same construction as that set forth in Letters Patent of the United States to William J. Carroll, dated September 15, 1908, No. 898,434. A dog "V is shown pivoted to the casing, and is con nected with the bolt 'R in the same manner as described in the above referred to patent, so as to prevent the removal of the key from the keyhole S. when the bolt R is protracted. (See Fig; 2.) A movable ward W is carried by the boltR and is adapted to be moved by the protraction of the bolt into the path of rotation of the key inserted through the outside keyhole Q to thereby block the operative engagement of a certain key or keys with the outside bolt. X is a connecting lever loosely mounted on a post Y in the casing A, which has one end projecting into a narrow slot Z (Fig. 4) on the under side of the bolt B, so that any movement ofthe bolt R will tend to swing the connecting lever X on its pivot, as shown more particularly in Figs, 1 and 2. The other end of the connecting'lever X projects into an elongated slot 10 on the Risa under side of the bolt P, wherein it has limited independent movement, so that as shown in Figs. 1 and 2, the connecting lever may be rotated on its pivot without operating the bolt P, and as shown in Fig. 3, the bolt P may be protracted when the bolt R is retracted without swinging the connecting lever X. The modes of relative control of one bolt by the other through the connecting lever and by means of the primary and master keys are the same as set forth in the said Carroll Patent, No. 898, l3et. That is, the protraction of either bolt when the other is protracted will cause the retraction of the latter; and neither the protraction or retraction oi": either bolt when the other is retracted will affect the latter. This is due to the fact that in the protracted move ment of the outside bolt 1 the inner end of the elongated slot 10 of the bolt will be against the lug or pin of the lever, which will be in its forward position toward the face plate, and hence when this bolt is retracted by the operation of its own key the elongated slotwill permit a free or lost mo tion of the boltwith respect to the lug, while when the inside bolt is protracted during the protracted condition of the outside bolt the lug is directly against the rear end of the slot 10 of the bolt, and hence must carry the latter rearwardly as the lever is rocked.

The connecting lever X is provided with a lateral oll'sct 1 from which projects a pin 2 loosely engaging a slot 3 in the head a of a sliding catch bar The upper end oi this bar has a latch tongue (3 extending in a straight line with the body of the bar. This tongue is adapted to be projected into a notch formed in the lower edge of the sliding yoke H.

When the lever X is rocked by the protraction of the inside bolt it through the operation of the inside key, the sliding bar will be carried upward and its latch tongue will enter the notch 7 and lock the yoke against sliding movement, and consequently lock the knob-hub and knob against rotation. Hence when the door is locked on the inside, the locked condition of the knob will give an indication to the maid that the room is occupied. The retraction of the bolt 1%, either through the operation of its own key or by the protraction of the outside bolt P when the bolt It is retracted, withdraws the catch bar, and the knob is then free to turn. It will thus be seen that the catch bar is thrown into locking position only through the operation of the bolt acces sible from the inside, and is released only by a key from the inside, or by an outside key of an emergency character so bitted as to enable it to pass the movable ward W and engage the tumblers of the outside bolt so as to protract said bolt P.

The direct engagement of the sliding noeaase catch bar with the yoke instead of with the latch bolt prevent-s lost motion between the knob hub and latch. bolt which might permit a rattling of the knob and enable a simpler and stronger form of catch bar to be employed. The catch bar is provided with a longitudinal slot 8, adapted to engage a fixed post which serves to guide the catch bar in a straight vertical movement. The engagement of the catch directly with the yoke instead of with the latch bolt, leaving the latter free to move when the yoke is locked, permits the deadlocking of the knob even if the latch should not be fully projected, for some reason, and also avoids danger of jamming the head of the latch bolt or bending of the catch bar, should the latter be actuated while the latch bolt is not fully projected.

I do not claim herein, the broad combination, in a lock, of dead bolt mechanism operable from both sides of the door with indicating manual test means at the outside of the door unafiected by the deadlocking of the door from the outside but set in indicating condition automatically as the door is deadlocked from the inside, as set forth in an application of William J. Carroll, Serial No. 307,643, filed March 28, 1906. Neither do I claim broadly a combination of the above mentioned character in which the indicating means is an outside knob or other member dogged by a sliding catch, as set forth in an application of John H. Shaw, Serial No. 307,66et, filed March 23, 1906.

What I do claim is:

1. in a lock, in combination with a door knob, a sliding yoke operatively associated therewith, a bodily movable yoke engaging member slidable in a straight line at right angles to the movement of the yoke, a look ing bolt, and means of positive operating engagement between said bolt and yoke-engaging member to automatically actuate and release said member by the movement of said bolt, substantially as described.

2. In a lock, in combination with a door knob, a slide yoke controlled thereby, a sliding catch bar movable in a straight line at right angles to the line of movement of the yoke and adapted to engage said yoke, a locking bolt, and mechanism positively connecting said bolt and catch bar and having means to translate the sliding movement 01' the bolt into a perpendicularly sliding movement of the catch bar, substantially as described.

3. In a lock, in combination with a knob and its hub, a slide yoke operable by said hub, a latch bolt having a shank separate from and extending parallel to said yoke, means of engagement between said shank and yoke, a yoke locking slide bar movable in a straight line at right angles to the move ment of the yoke, said yoke having means to 130 engage the slide bar, a locking bolt, and means of operative connection between said bolt and slide bar, substantially as described.

4. In a lock, in combination with a knob, a sliding latch-bolt controlling yoke operatively associated with said knob, a slide bar to lock said knob against rotation, and means of direct engagement between said bar and yoke, a bolt operable directly by a key alone, and a keyhole for said bolt on the inside of the door only, and means of positive engagement between the bolt and slide bar, substantially as described.

5. In a lock, in combination with a bolt, a knob, a key for operating said bolt, a keyhole open only on the inside for the operation of said bolt by said key, and means for locking said knob by the protraction of said bolt to provide exteriormeans of indication of the protraction of the bolt consisting of a slidebar, the knob yoke having a slot to receive said bar, and means of positive operative engagement between the bolt and slide bar, substantially as described.

6. In a lock, in combination with a casing, a knob, a knob yoke, a bolt, said casing having an inside keyhole only for the direct operation of said bolt by a key, an eXteriorly key operated bolt, the casing having an outside keyhole therefor, means operative by the protraotion of the first bolt to block said outside keyhole, and means simultaneously operative by the protraction of said first bolt to lock the knob against rotation comprising a slide bar having means of direct engagement with said yoke and means of operative connection between said first bolt and said slide bar, substantially as described.

7. In a lock, in combination with a casing, a plurality of bolts respectively operable by direct key action from the inside only and from the outside only of the'casing, a knob, a knob yoke, a single sliding catch bar, means of direct locking engagement between the catch bar and yoke to lock said knob, and means of common connection between said slide bar and said bolts, substantially as described.

8. In a lock, in combination with a bolt directly operable by a key, a sliding catch bar directly operable by the bolt simulta neously with the key movement, a knob, and a knob yoke having means of direct engagement with said bar to lock said knob, substantially as described.

9. In a lock, in combination with a bolt, a sliding catch bar having at one end a tongue projecting in the direction of movement of said bar, means to automatically move said bar by the protraction and retraction of said bolt, a knob, and a knob yoke extending at right angles to said bar and having an undercut slot to receive said tongue, substantially as described.

In witness whereof, I have hereunto set my hand on the 24th day of March, 1911.

JOHN H. SHAWV.

Witnesses:

JosEPH D. SARGEN'I, BERTHA RAY.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, C. 

